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Greater Scaup?

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If they are still around, the females are easier to differentiate between Greater and Lesser. Female lessers have a crisp white facial mask versus a mangy ,blotchy mask on the greater.Unlees you have great light conditions, head color is tough to determine from any distance, as you already know.Head shape,round =Greater, peaked and blocky =Lesser.here in ohio, both have started showing up in numbers in the past 2 weeks. Flank whiteness can be deceiving as young drake Greaters can appear dirty also

Edited by John Landon
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So while school is in, head shape is a definite point to key on,while flank degree of whiteness,head color, female mask are all variable and subject to maturity and possible interbreeding. At one time, I thought one species was more fond of salt or brackish waters than the other.? Lesser hen,angular head taken last year about this time.


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